148 lines
4.5 KiB
Python
148 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
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# *****************************************************************************
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Module authors:
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# Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
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#
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# *****************************************************************************
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"""Define Simulation classes"""
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import random
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from time import sleep
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from secop.datatypes import FloatRange
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from secop.lib import mkthread
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from secop.modules import BasicPoller, Drivable, \
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Module, Parameter, Readable, Writable, Command
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class SimBase:
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pollerClass = BasicPoller
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def __new__(cls, devname, logger, cfgdict, dispatcher):
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extra_params = cfgdict.pop('extra_params', '') or cfgdict.pop('.extra_params', '')
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attrs = {}
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if extra_params:
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for k in extra_params.split(','):
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k = k.strip()
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attrs[k] = Parameter('extra_param: %s' % k.strip(),
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datatype=FloatRange(),
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default=0.0)
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def reader(self, pname=k):
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self.log.debug('simulated reading %s' % pname)
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return self.parameters[pname].value
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attrs['read_' + k] = reader
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def writer(self, newval, pname=k):
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self.log.debug('simulated writing %r to %s' % (newval, pname))
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self.parameters[pname].value = newval
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return newval
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attrs['write_' + k] = writer
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return object.__new__(type('SimBase_%s' % devname, (cls,), attrs))
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def initModule(self):
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self._sim_thread = mkthread(self._sim)
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def _sim(self):
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try:
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if not self.sim():
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self.log.info('sim thread running')
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while not self.sim():
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pass
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self.log.info('sim thread ended')
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except Exception as e:
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self.log.exception(e)
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def sim(self):
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return True # nothing to do, stop thread
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class SimModule(SimBase, Module):
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pass
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class SimReadable(SimBase, Readable):
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def __init__(self, devname, logger, cfgdict, dispatcher):
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super().__init__(devname, logger, cfgdict, dispatcher)
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self._value = self.parameters['value'].default
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def read_value(self):
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if 'jitter' in self.parameters:
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return self._value + self.jitter * (0.5 - random.random())
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return self._value
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class SimWritable(SimReadable, Writable):
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def read_value(self):
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return self.target
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def write_target(self, value):
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self.value = value
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def _hw_wait(self):
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pass
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class SimDrivable(SimReadable, Drivable):
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interval = Parameter('simulation interval', FloatRange(0, 1), readonly=False, default=0.3)
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def sim(self):
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while self._value == self.target:
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sleep(self.interval)
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self.status = self.Status.BUSY, 'MOVING'
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speed = 0
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if 'ramp' in self.accessibles:
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speed = self.ramp / 60. # ramp is per minute!
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elif 'speed' in self.accessibles:
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speed = self.speed
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if speed == 0:
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self._value = self.target
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speed *= self.interval
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try:
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self.pollParams(0)
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except Exception:
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pass
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while self._value != self.target:
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if self._value < self.target - speed:
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self._value += speed
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elif self._value > self.target + speed:
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self._value -= speed
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else:
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self._value = self.target
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sleep(self.interval)
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try:
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self.pollParams(0)
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except Exception:
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pass
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self.status = self.Status.IDLE, ''
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return False # keep thread running
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def _hw_wait(self):
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while self.status[0] == self.Status.BUSY:
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sleep(self.interval)
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@Command
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def stop(self):
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self.target = self.value
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